The São Paulo Health Survey (ISA) was first conducted in 2003, and again in 2008 and 2014, by the city's Municipal Health Department in collaboration with researchers from the University of São Paulo and a few other local institutions. The ISA is intended to produce information and knowledge on the health status, living conditions, lifestyle, and health care utilization of the urban population. Survey topics include socioeconomic characteristics, nutritional status, maternal and child health, health care use, preventive examinations, and health care spending. Informed by a probablisitic stratified sample design, the survey collected data via direct interview from a representative of each private household sampled. For the 2008 survey, 3,271 people were interviewed.